Most commonly when speaking to one person, people say: Athbhliain faoi mhaise duit and when speaking to more than one person: Athbhliain faoi mhaise daoibh

Bliain is year. An AthBhliain is the New Year, but so is An Bhliain Úr

Maise is the happiness you’re wishing somebody prosper or be adorned with. Faoi is under, and who wouldn’t want to have a year under happiness?

Duit indicates you are talking to a single person, as you wish whatever to them. Daoibh does the same for when you are addressing people plural.

Similarly leat means with you (singular), and libh with you (plural).

Guí is a prayer. Dea-ghuí is a good wish. Gach is every. Le is with - but you knew that.

Sonas is another form of happiness, the lucky sort. Rath is another form of prosperity. Both are good things to live under. Beannachtaí are blessings or greetings. Suimneach is peaceful. And on it goes.